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PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.

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Presentation on theme: "PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing."— Presentation transcript:

1 PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PART B 5 The Axial Skeletal System

2 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal System  206 Bones in body

3 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Table 07.01

4 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton  Forms the longitudinal axis of the body  Divided into three parts  Skull  Vertebral column  Bony thorax

5 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Figure 5.6a

6 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Figure 5.6b

7 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Skull  Two sets of bones  Cranium  Facial bones  Bones are joined by sutures

8 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Cranial Bones  Frontal Bone- makes up forehead  Supraorbital Forament- holes above eyes  Occipital Bone- back of head  Occipital chondyles- connect head to cervical vertebrae  Foramen Magnum- hole for brain stem  Parietal Bones  Bones on each side of the head

9 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Anterior View Figure 5.11

10 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Inferior View Figure 5.9

11 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Lateral View Figure 5.7

12 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Cranial Bones  Temporal Bone  Skull bone by ears  Mastoid process- bump below ear  Mastoiditis- inflammation of air spaces of mastoid process  External Auditory (or Acoustic) Meatus- ear  Zygomatic Process- connects cheek bone to temporal bone  Styloid Process- projection inferior to external auditory meatus  Carotid Canal- where carotid artery runs

13 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Lateral View Figure 5.7

14 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Cranial Bones  Sphenoid Bone  Bat or butterfly  Acts as a brace for the skull  Greater Wing  Lesser Wing  Sella turcica- where pituitary gland sits  Foramen Ovale- hole for cranial nerve 5 to pass to chewing muscle of the lower jaw  Optical Canal- allows optic nerve to pass to eye

15 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sphenoid Bone  Superior Orbital Fissure- cranial nerve controlling eye movements to pass through

16 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sphenoid Bone

17 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Superior View Figure 5.8

18 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Inferior View Figure 5.9

19 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Cranial Bones  Ethmoid Bone- makes up eye and nose  Cristi gali- hook of ethmoid that holds the menenges in place  Cribiform plate- separates nasal and oral cavity  Holes for nerves to reach the brain  Makes up part of superior and middle conchae (nasal walls)  Perpendicular plate  Divides nose into right and left  Deviated septum

20 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Anterior View Figure 5.11

21 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Lateral View Figure 5.7

22 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Facial Bones  Only mandible and vomer are single bones  Lacrimal bone- just inside eye  Has tear ducts  Mandible-jaw  Largest and strongest bone in face  Only moveable joint in face  Alveolar Processes-hold teeth in  Chondyloid or Chondyler process- posterior part of jaw that connects to temporal bone

23 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Facial Bones  Mandible  Coronoid Process- anterior part of jaw that connects to temporal bone  Mental foramen- for nerves that carry info from lips and chin  Mandibular Foramen- nerves for lower teeth

24 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Facial Bones  Maxillary or Maxilla  Fuse to form upper jaw  Alveolar processes- bones for teeth  Infraorbital foramen- holes below eyes  Palatine process- forms the anterior portion of the hard palate  Nasal Bones- forms bridge of nose  Palatine bones- make up the palate  Vomer- makes up bottom part of septum

25 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Facial Bones  Zygomatic Bones- cheek bones  Hyoid Bone-  Only bone that doesn’t articulate with another bone  Serves as a base for the tongue

26 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Hyoid Bone Figure 5.12

27 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sutures  Immoveable joints between skull bones  Saggital suture- connects two parietals  Coronal- connects frontal and two parietals  Lambdoidal- connects parietals to occipital  Squamous- connects temporal to parietal

28 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Sutures

29 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses  Hollow portions of bones surrounding the nasal cavity  Functions of paranasal sinuses  Lighten the skull  Give resonance and amplification to voice  Four bones with sinuses  Frontal  Maxillary  Sphenoid  Ethmoid

30 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Figure 5.10a

31 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Figure 5.10b

32 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull  The fetal skull is large compared to the infant’s total body length  Fontanels—fibrous membranes connecting the cranial bones  Allow the brain to grow  Convert to bone within 24 months after birth

33 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull Figure 5.13a

34 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Fetal Skull Figure 5.13b


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